C4. My thinking is that when you plug in the glowplugs relay, it creates a little extra load on the battery (though not much, as you're not energising the glowplugs), and the voltage drop is just enough for other electrics to play up/fail. As Peter suggests, voltmeter across battery. AUDI. PEUGEOT. NISSAN. TOYOTA. OPEL. HONDA. FIAT. Illustrated step-by-step manuals and video tutorials on replacing CITROËN C4 Indicator Bulb will tell you how to carry out DIY replacement of parts and maintenance of your car quickly and cheaply. Sun Apr 29 2012, 05:06am. Hi All, A local mechanic came to me with a 2007 Picasso Exclusive where he replaced the rear left sus bagWhen I plug in lexia it comes back with two faults.. 1) C1629 compressor relay open circuit (permanent) 2) C1196 Height Change inconsistent coherent. looking through my own sedre ele drawings I cannot see a Relay Citroen paint codes - Location. As with most car manufacturers Citroen paint codes can be found in several locations. The most reliable place is inside the drivers side door shut on a white and silver sticker (see image). On some models it will be in by the hinges of the door (where the door hangs) as in the below image. Y4Np.